7=5-2a

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Solution for 7=5-2a equation: 



7=5-2a

We move all terms to the left:

7-(5-2a)=0

We add all the numbers together, and all the variables

-(-2a+5)+7=0

We get rid of parentheses

2a-5+7=0

We add all the numbers together, and all the variables

2a+2=0

We move all terms containing a to the left, all other terms to the right

2a=-2

a=-2/2

a=-1

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